Against the oxidative damage theory of aging: superoxide dismutases protect against oxidative stress but have little or no effect on life span in Caenorhabditis elegans.

Abstract:

:The superoxide radical (O(2)(-)) has long been considered a major cause of aging. O(2)(-) in cytosolic, extracellular, and mitochondrial pools is detoxified by dedicated superoxide dismutase (SOD) isoforms. We tested the impact of each SOD isoform in Caenorhabditis elegans by manipulating its five sod genes and saw no major effects on life span. sod genes are not required for daf-2 insulin/IGF-1 receptor mutant longevity. However, loss of the extracellular Cu/ZnSOD sod-4 enhances daf-2 longevity and constitutive diapause, suggesting a signaling role for sod-4. Overall, these findings imply that O(2)(-) is not a major determinant of aging in C. elegans.

journal_name

Genes Dev

journal_title

Genes & development

authors

Doonan R,McElwee JJ,Matthijssens F,Walker GA,Houthoofd K,Back P,Matscheski A,Vanfleteren JR,Gems D

doi

10.1101/gad.504808

subject

Has Abstract

pub_date

2008-12-01 00:00:00

pages

3236-41

issue

23

eissn

0890-9369

issn

1549-5477

pii

22/23/3236

journal_volume

22

pub_type

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